Prebiotic/Probiotic/Postbiotic

Bacillus … Ferment Filtrate

INCI: BACILLUS/LACTOBACILLUS/SACCHAROMYCES/COLLOIDAL GOLD/HYALURONIC ACID/RICE BRAN FERMENT FILTRATE

Reviewed by Kate · Last updated 2 Jun 2026

Also known as: Bacillus/lactobacillus/saccharomyces/colloidal Gold/hyaluronic Acid/rice Bran Ferment Filtrate

A blend of fermented ingredients and hydrating polymers for skin conditioning

Best For Skin Types

All, Dry, Sensitive, Mature

Addresses

Dryness, Hydration, Fine lines

Usage Frequency

Daily

What Is Bacillus … Ferment Filtrate?

This ingredient profile combines several skin-conditioning components: fermented filtrates from rice bran and beneficial microorganisms (Bacillus, Lactobacillus, and Saccharomyces species), alongside hyaluronic acid and colloidal gold. The fermentation process breaks down larger molecules into smaller, more bioavailable compounds that may penetrate the skin more effectively than their non-fermented counterparts.

Together, these components work as humectants and skin conditioning agents, designed to support hydration and maintain skin comfort. Hyaluronic acid is a naturally occurring polysaccharide that binds water to the skin, whilst fermented extracts may offer additional antioxidant and prebiotic properties.

How It Works

Hyaluronic acid works as a humectant, drawing water from the dermis into the epidermis and holding it in the stratum corneum, the skin's outer layer. This increases skin hydration and can temporarily plump fine lines. The fermented filtrates contain smaller molecular fragments that may penetrate more readily than their unfermented forms, potentially delivering antioxidants and amino acids where they're needed.

Colloidal gold particles are thought to have anti-inflammatory properties and may improve skin condition, though their mechanism is not fully understood. The combination is designed to provide both immediate hydration and longer-term skin conditioning benefits.

Clinical Evidence & References

Hyaluronic acid has robust evidence supporting its hydrating and skin-plumping properties across multiple studies. Fermented skincare ingredients show promise in preliminary research, with some studies suggesting enhanced bioavailability and improved skin barrier function, but high-quality human trials are limited.

Colloidal gold is less well-researched in skincare; whilst it has been used historically and shows anti-inflammatory potential in some laboratory settings, clinical evidence in human skin is sparse. The combination of these ingredients is marketed as synergistic, but comparative studies evaluating this specific blend are not readily available in peer-reviewed literature.

How to Use

These ingredients are typically found in serums, essences, and moisturisers. Apply to clean skin before heavier creams or oils to maximise hydration. If using multiple hydrating products, layer from lightest to heaviest texture. Fermented and gold-containing formulations are generally gentle, but introduce them gradually if you have sensitive skin to monitor tolerance.

Safety & Precautions

These ingredients are generally well-tolerated and suitable for most skin types. Colloidal gold particles should be sourced from reputable manufacturers to ensure purity and appropriate particle size; poorly manufactured formulations may carry contaminant risks.

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